6428245 has 4 divisors (see below), whose sum is σ = 7713900. Its totient is φ = 5142592.

The previous prime is 6428207. The next prime is 6428263. The reversal of 6428245 is 5428246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4835601 + 1592644 = 2199^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 6428245 - 2⁷ = 6428117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642820 + ... + 642829.

It is an arithmetic number, because the mean of its divisors is an integer number (1928475).

Almost surely, 2^6428245 is an apocalyptic number.

It is an amenable number.

6428245 is a deficient number, since it is larger than the sum of its proper divisors (1285655).

6428245 is a wasteful number, since it uses less digits than its factorization.

6428245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285654.

The product of its digits is 15360, while the sum is 31.

The square root of 6428245 is about 2535.3983907860. The cubic root of 6428245 is about 185.9362810221.

Subtracting from 6428245 its reverse (5428246), we obtain a palindrome (999999).

The spelling of 6428245 in words is "six million, four hundred twenty-eight thousand, two hundred forty-five".